<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title>Title</title>
    </head>
    <body>
    <form method="post" action="/user/save">
        id:<input type="text" name="id"><br>
        name:<input type="text" name="name"><br>
        age:<input type="text" name="age"><br>
        <input type="submit" value="submit">
    </form>
    </body>
</html>